CN111897313B - Communication channel switching circuit of vehicle diagnostic equipment - Google Patents
Communication channel switching circuit of vehicle diagnostic equipment Download PDFInfo
- Publication number
- CN111897313B CN111897313B CN202010804348.1A CN202010804348A CN111897313B CN 111897313 B CN111897313 B CN 111897313B CN 202010804348 A CN202010804348 A CN 202010804348A CN 111897313 B CN111897313 B CN 111897313B
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- CN
- China
- Prior art keywords
- communication channel
- electric contact
- cylinder
- piece
- switching circuit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40013—Details regarding a bus controller
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
Abstract
A communication channel switching circuit of vehicle diagnostic equipment comprises a plurality of communication channels arranged on a circuit board, wherein each communication channel is respectively connected with each pin of an OBD connector through a plurality of switch pieces, the circuit board is provided with through holes corresponding to the switch pieces one by one, each switch piece comprises a first electric contact piece, a second electric contact piece and a cylinder body capable of moving up and down, the cylinder body penetrates through the through holes and is in sliding fit with the through holes, the top of the cylinder body is provided with an electric conduction piece capable of being in up-and-down electric contact with the first electric contact piece and the second electric contact piece when the cylinder body moves down, and an elastic self-recovery piece is arranged between the electric conduction piece and the circuit board; and the power source is used for driving the column to move up and down. The invention has the advantages of small volume, low cost, stable function, no signal interference and the like, and is suitable for high-power external circuits.
Description
Technical Field
The invention belongs to the technical field of vehicle diagnosis, and particularly relates to a communication channel switching circuit of vehicle diagnosis equipment.
Background
The vehicle diagnosis equipment is communicated with the vehicle control module, reads related parameters, determines the technical condition of the vehicle, and finds out fault parts and reasons for optimizing vehicle operation and after-sales maintenance. The vehicle control module has various communication modes, including various protocols such as 232 protocol, 485 protocol, 1708 protocol, CAN protocol and K protocol, and the pin definition of the vehicle OBD diagnosis port is also various, so that each communication channel of the diagnosis device CAN be accurately switched to the pin corresponding to the OBD plug, a switching circuit capable of switching the communication channel to the corresponding pin is designed in the diagnosis device, and the circuit is usually designed as a matrix circuit.
The current methods for switching the circuit in the automobile diagnostic equipment on the market have the following two types:
1. and a mechanical relay is adopted for bus switching.
2. And a solid-state relay is adopted for bus type switching.
The mechanical relay has a large size and occupies a large space, while the solid-state relay has a high cost, is unstable, can be interfered by signals, and cannot be applied to a high-power external circuit, and particularly, the defects are multiplied along with the increase of communication channels (protocols are increased).
Disclosure of Invention
In view of the above, a communication channel switching circuit of a vehicle diagnostic apparatus is provided.
In order to solve the technical problems, the invention adopts the following technical scheme:
a communication channel switching circuit of a vehicle diagnostic device includes a plurality of communications arranged on a circuit board
The passageway, every communication channel is equallyd divide and is connected with every stitch that the OBD connects through a plurality of switch spares respectively, have on the circuit board with the through-hole of a plurality of switch spares one-to-one, the switch spare includes:
the first electric contact and the second electric contact are arranged at the edge of the corresponding through hole on the circuit board, the first electric contact is connected with the corresponding communication channel, and the second electric contact is connected with the corresponding pin;
the cylinder can move up and down, the cylinder passes through the through hole and is in sliding fit with the through hole, the top of the cylinder is provided with an electric conducting piece which can be in up-and-down electric contact with the first electric contact piece and the second electric contact piece when the cylinder moves down, and an elastic self-recovery piece is arranged between the electric conducting piece and the circuit board;
and the power source is used for driving the column to move up and down.
The lower extreme of cylinder is equipped with the locating part of radial arrangement.
The power supply is solenoid, solenoid locates the radial outside of the lower part of cylinder, and with the circuit board is fixed, the cylinder is the insulated column, the electric conduction piece adopts the magnetic metal material.
The electric conduction piece is made of iron.
The electromagnetic coil is subjected to enable control through a MOS drive circuit.
The first electric contact and the second electric contact are both semicircular copper sheets which are symmetrically arranged on the edges of the corresponding through holes.
The electric conducting piece comprises a horizontal rod body, and two ends of the rod body vertically extend downwards to form contacts corresponding to the first electric contact piece and the second electric contact piece.
The elastic self-restoring piece is a spring, and the spring is sleeved at the upper end of the column body.
The through holes are arranged in a matrix.
The invention can ensure that each communication channel of the diagnostic equipment can be accurately switched to the corresponding pin according to the requirement, is suitable for the application scene that a plurality of communication channels respectively work independently, and has the advantages of small volume, low cost, stable function, suitability for high-power external circuits, no signal interference and the like.
Drawings
The invention is described in detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the switching element of the present invention;
FIG. 3 is a schematic diagram of a MOS driving circuit according to the present invention;
fig. 4 is a schematic top view of the first electrical contact and the second electrical contact of the present invention.
Detailed Description
As shown in fig. 1 and 2, a communication channel switching circuit of a vehicle diagnostic apparatus includes a plurality of communication channels 110 disposed on a circuit board 20, each communication channel 110 is connected to each pin of an OBD connector through a plurality of switch members 120, the circuit board 20 has through holes 21 corresponding to the plurality of switch members 120 one by one, and the switch members 120 include a first electrical contact 121, a second electrical contact 122, a cylinder 123, and a power source 124.
Wherein, the through hole 21 is a mechanical hole, and the upper part and the lower part are not electrically connected.
A first electrical contact 121 and a second electrical contact 122 are provided on the circuit board 20 at the edges of the corresponding through hole 21, see fig. 4, the first electrical contact 121 being connected to the corresponding communication channel 110 and the second electrical contact 122 being connected to the corresponding pin.
The column 123 can move up and down, and passes through the through hole 21, and the two are slidably engaged, the top of the column 123 has an electrical conducting member 125 capable of making up and down electrical contact with the first electrical contact 121 and the second electrical contact 122 when the column 123 moves down, and an elastic self-restoring member 126 is disposed between the electrical conducting member 125 and the circuit board 20.
The power source 124 is used to drive the column 123 up and down.
When the cylinder 123 is at the initial position, the electrical conducting member 125 is located above the first electrical contact 121 and the second electrical contact 122, in use, the cylinder 123 is driven by the power source 124 to move downward from the initial position, and after moving downward to a certain distance, the electrical conducting member 125 is just in electrical contact with the first electrical contact 121 and the second electrical contact 122, so that the first electrical contact 121 and the second electrical contact 122 are in contact conduction, thereby conducting the current communication channel with the corresponding pin, meanwhile, the elastic self-restoring member 126 is compressed during the downward movement of the cylinder 123, when it is required to disconnect the current communication channel with the corresponding pin, the power source 124 stops working, and the cylinder 123 returns to the initial position under the action of the elastic self-restoring member 126.
As shown in fig. 1, if the CAN _ L communication channel needs to be connected to the pin 1, the switch element 120 corresponding to the through hole 21 at the upper left corner in the drawing may be actuated, or of course, the CAN _ L communication channel may be connected to a plurality of pins through a plurality of switch elements 120.
The invention can ensure that each communication channel of the diagnostic equipment can be accurately switched to the corresponding pin according to the requirement, is suitable for the application scene that a plurality of communication channels respectively work independently, and has the advantages of small volume, low cost, stable function, suitability for high-power external circuits, no signal interference and the like.
In this embodiment, the first electrical contact 121 and the second electrical contact 122 are semi-circular copper sheets, and are symmetrically disposed on the edge of the corresponding through hole 21.
The electrical conductor 125 includes a horizontal rod 125a, and two ends of the rod 125a extend vertically downward to form contacts 125b corresponding to the first electrical contact 121 and the second electrical contact 122.
The elastic self-restoring member 126 may be a spring, and the spring is sleeved on the upper end of the column 123.
In the embodiment, the lower end of the column 123 is provided with a radially disposed stopper 127, and the stopper 127 is in a horizontal rod shape, so as to prevent the column 123 from being separated from the circuit board 20 when the column 123 moves upward under the action of the elastic self-restoring member 126.
In the present embodiment, the power source 124 is an electromagnetic coil L3, the electromagnetic coil is disposed radially outside of the lower portion of the column 123 and fixed to the circuit board 20, accordingly, the column 123 is an insulating column, and the electric conducting member 125 is made of a magnetic metal material. When the electromagnetic coil is in an enabled state, the electromagnetic coil generates an electromagnetic attraction force, the conductive member 125 is attracted to move the column 123 downward, and after the column moves a certain distance, the contacts 125b at both ends are just in electrical contact with the first electrical contact 121 and the second electrical contact 122, so that the first electrical contact 121 and the second electrical contact 122 are electrically connected; in the solenoid-disabled state, the post 123 returns to the initial position under the action of the resilient self-return member 126.
Specifically, the electric conductor 125 is made of iron, but cobalt, nickel or other magnetic metal material may be used.
As shown in fig. 3, the electromagnetic coil performs the performance control through the MOS driving circuit, and the specific structure is as follows: one end of the electromagnetic coil L3 is connected with a power supply terminal VCC, the other end is connected with a collector of an MOS tube Q18, an emitter of the MOS tube Q18 is grounded, a base of the MOS tube Q18 is grounded through a resistor R51, the base is connected with a switching signal through a resistor R50, the switching signal comes from an MCU main control circuit of the diagnostic equipment, and the resistor R50 and the resistor R51 play a role in protecting an MOS drive circuit.
When the MOS transistor Q18 is on, the electromagnetic coil is enabled, and when it is off, it is disabled.
Preferably, as shown in fig. 1, in the present embodiment, the through holes 21 are arranged in a matrix, of course, the present invention is not limited to the 5 × 5 matrix shown in the figure.
However, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present invention, and that changes and modifications to the above described embodiments are intended to fall within the scope of the appended claims, provided they fall within the true spirit of the present invention.
Claims (7)
1. The utility model provides a communication channel switching circuit of vehicle diagnostic equipment, is including locating a plurality of communication channels on the circuit board, every communication channel is equallyd divide and is connected with every stitch that OBD connects through a plurality of switch spares respectively, its characterized in that, have on the circuit board with the through-hole of a plurality of switch spares one-to-one, the switch spare includes:
the first electric contact and the second electric contact are arranged at the edge of the corresponding through hole on the circuit board, the first electric contact is connected with the corresponding communication channel, and the second electric contact is connected with the corresponding pin;
the cylinder can move up and down, the cylinder passes through the through hole and is in sliding fit with the through hole, the top of the cylinder is provided with an electric conducting piece which can be in up-and-down electric contact with the first electric contact piece and the second electric contact piece when the cylinder moves down, and an elastic self-recovery piece is arranged between the electric conducting piece and the circuit board; the electric conducting piece comprises a horizontal rod body, and two ends of the rod body vertically extend downwards to form contacts corresponding to the first electric contact piece and the second electric contact piece;
the power source is used for driving the column to move up and down;
the lower extreme of cylinder is equipped with the locating part of radial arrangement.
2. The communication channel switching circuit of the vehicle diagnostic apparatus as set forth in claim 1, wherein the power source is an electromagnetic coil disposed radially outside of a lower portion of the cylinder and fixed to the circuit board, the cylinder is an insulating cylinder, and the electrically conductive member is made of a magnetic metal material.
3. The communication channel switching circuit of a vehicular diagnostic apparatus as set forth in claim 2, wherein said electrically conductive member is made of iron.
4. The communication channel switching circuit of a vehicular diagnostic apparatus according to claim 3, characterized in that the electromagnetic coil is enable-controlled by a MOS drive circuit.
5. The communication channel switching circuit of the vehicle diagnostic apparatus according to claim 4, wherein the first electrical contact and the second electrical contact are semicircular copper sheets, and are symmetrically disposed on the edge of the corresponding through hole.
6. The communication channel switching circuit of the vehicular diagnostic apparatus as set forth in claim 5, wherein the resilient self-restoring member is a spring, and the spring is sleeved on an upper end of the cylinder.
7. The communication channel switching circuit of a vehicular diagnostic apparatus according to claim 6, wherein the through holes are arranged in a matrix.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010804348.1A CN111897313B (en) | 2020-08-10 | 2020-08-10 | Communication channel switching circuit of vehicle diagnostic equipment |
| CA3141188A CA3141188A1 (en) | 2020-08-10 | 2021-03-18 | Communication channel switching circuit for vehicle diagnosis equipment |
| PCT/CN2021/081604 WO2021218476A1 (en) | 2020-08-10 | 2021-03-18 | Communication channel switching circuit of vehicle diagnostic device |
| AU2021265924A AU2021265924A1 (en) | 2020-08-10 | 2021-03-18 | Communication channel switching circuit of vehicle diagnostic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010804348.1A CN111897313B (en) | 2020-08-10 | 2020-08-10 | Communication channel switching circuit of vehicle diagnostic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111897313A CN111897313A (en) | 2020-11-06 |
| CN111897313B true CN111897313B (en) | 2021-11-16 |
Family
ID=73228842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010804348.1A Active CN111897313B (en) | 2020-08-10 | 2020-08-10 | Communication channel switching circuit of vehicle diagnostic equipment |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN111897313B (en) |
| AU (1) | AU2021265924A1 (en) |
| CA (1) | CA3141188A1 (en) |
| WO (1) | WO2021218476A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111897313B (en) * | 2020-08-10 | 2021-11-16 | 上海星融汽车科技有限公司 | Communication channel switching circuit of vehicle diagnostic equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643634A (en) * | 2002-03-21 | 2005-07-20 | 特里普科有限公司 | Resettable switching device |
| CN101458165A (en) * | 2008-12-30 | 2009-06-17 | 深圳市元征软件开发有限公司 | Automobile diagnosis test joint and implementing method thereof |
| CN102436256A (en) * | 2011-10-31 | 2012-05-02 | 深圳市元征软件开发有限公司 | Diagnosis joint for vehicle |
| CN105068528A (en) * | 2015-07-10 | 2015-11-18 | 深圳市元征科技股份有限公司 | Communication device of automobile diagnosis system |
| CN105116871A (en) * | 2015-07-10 | 2015-12-02 | 深圳市元征科技股份有限公司 | Signal transmission circuit and communication device of automobile diagnosis system |
| CN207424565U (en) * | 2017-09-25 | 2018-05-29 | 深圳市三羚智能电子有限公司 | Car OBD interface switching at runtime equipment |
| CN207516795U (en) * | 2017-11-28 | 2018-06-19 | 叶懿 | A kind of automobile bus switching and the switching circuit of communication line |
| CN109683595A (en) * | 2019-02-21 | 2019-04-26 | 广州亚美信息科技有限公司 | A kind of the Self Matching method, apparatus and system of car OBD interface stitch |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990025300A (en) * | 1997-09-11 | 1999-04-06 | 윤종용 | Jig point with through hole formed, substrate and jig point manufacturing method using the same |
| JP3997529B2 (en) * | 2004-01-05 | 2007-10-24 | 三菱ふそうトラック・バス株式会社 | Vehicle failure diagnosis method |
| CN204789806U (en) * | 2015-07-09 | 2015-11-18 | 长春富维伟世通汽车电子有限公司 | Automotive electronics tests diagnostic tool |
| CN106207556B (en) * | 2016-07-06 | 2019-08-02 | 深圳市元征科技股份有限公司 | A kind of connection structure and OBD car-mounted terminal based on OBD diagnosis interface |
| CN111897313B (en) * | 2020-08-10 | 2021-11-16 | 上海星融汽车科技有限公司 | Communication channel switching circuit of vehicle diagnostic equipment |
-
2020
- 2020-08-10 CN CN202010804348.1A patent/CN111897313B/en active Active
-
2021
- 2021-03-18 AU AU2021265924A patent/AU2021265924A1/en not_active Abandoned
- 2021-03-18 WO PCT/CN2021/081604 patent/WO2021218476A1/en active Application Filing
- 2021-03-18 CA CA3141188A patent/CA3141188A1/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643634A (en) * | 2002-03-21 | 2005-07-20 | 特里普科有限公司 | Resettable switching device |
| CN101458165A (en) * | 2008-12-30 | 2009-06-17 | 深圳市元征软件开发有限公司 | Automobile diagnosis test joint and implementing method thereof |
| CN102436256A (en) * | 2011-10-31 | 2012-05-02 | 深圳市元征软件开发有限公司 | Diagnosis joint for vehicle |
| CN105068528A (en) * | 2015-07-10 | 2015-11-18 | 深圳市元征科技股份有限公司 | Communication device of automobile diagnosis system |
| CN105116871A (en) * | 2015-07-10 | 2015-12-02 | 深圳市元征科技股份有限公司 | Signal transmission circuit and communication device of automobile diagnosis system |
| CN207424565U (en) * | 2017-09-25 | 2018-05-29 | 深圳市三羚智能电子有限公司 | Car OBD interface switching at runtime equipment |
| CN207516795U (en) * | 2017-11-28 | 2018-06-19 | 叶懿 | A kind of automobile bus switching and the switching circuit of communication line |
| CN109683595A (en) * | 2019-02-21 | 2019-04-26 | 广州亚美信息科技有限公司 | A kind of the Self Matching method, apparatus and system of car OBD interface stitch |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2021265924A1 (en) | 2022-02-24 |
| CA3141188A1 (en) | 2021-11-04 |
| WO2021218476A1 (en) | 2021-11-04 |
| CN111897313A (en) | 2020-11-06 |
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